Multijoint spring anchor



Jan. 17, 1956 Q s s u 2,730,774

MULTIJOINT SPRING ANCHOR Filed May 12, 1950 1N VEN TOR.

United States Patent O MULTIJOINT SPRING ANCHOR Clarence Sagstuen, Rice Lake, Wis.

Application May 12, 1950, Serial No. 161,705

Claims. (Cl. 20-16 This invention consists of a double angle offset link of rigid material; one end having an anti-twist bearing, free to revolve on a bearing pin which is mounted on the door (or cover) jamb (or casing), and the other end has a hole 01' slot in which a spring or spring extension is attached to the door (or cover).

The object is to prevent the spring from making contact with, and chafing the door (or cover) or the jamb (or casing) and also prevent damage to the spring or spring extension when the door (or cover) is swung open between 90 and 180.

The spring also has a greater mechanical advantage than when mounted in the conventional manner, when the door (or cover) is opened between 90 and 180, due to the unique shift in the spring's anchoring point of rotation which shifts to the links end as the link becomes stationary upon striking the jarnb (or casing) or projection thereon.

One form of the invention is illustrated in the accompanying drawing.

This link does not act as a door check-but it does shift the point of rotation of the spring as said link strikes an obstruction. Therefore it is entirely difierent from the common type door check linkage.

Illustrated in perspective in Fig. 1 is a link of rigid material with an angular ofiset between two points, and on one end it is looped (or of similar construction) to form an anti-twist bearing; and at the opposite end it has a hole or slot.

Fig. 2 is a plan view, with the jamb (or casing) and the door (or cover) shown in section at a point just above the spring assembly mounting.

Fig. 3 is a side view of Fig. 2.

Fig. 4 is a complete plan view on a reduced scale of the device embodying my invention.

Figs. 2 and 3 show the link of Fig. 1 installed ready for use. One alternate position this installation assumes in use is shown dotted in Fig. 2. Hereafter the link shown in Fig. 1 will be designated as merely 1.

in Fig. 2 and Fig. 3, link 1, is of rigid material and has at one end an anti-twist bearing 2, which is free to oscillate on a stationary bearing pin 3, which is nonrevolving and rigidly anchored to the jamb (or casing) 4. One the other end, link 1 has a slot (or hole) 5, to which is attached and free to revolve, a spring or spring extension 6, which in turn is attached to a door (or cover) 7 in the conventional manner.

Link 1 has two bends; one at point 8, and one at point 9, which ofisets the portion with the slot or hole 5, sufiiciently to clear the door (or cover) 7, when point 8, comes in contact with the jamb (or casing) 4, or projection thereon; and the spring or spring extension 6, will then revolve about slot or hole 5, (as the link 1 itself is then stationary). Therefore said spring or spring extension 6, will never come in contact with the door (or cover) 7, or the jamb (or casing) 4, as the door (or cover) 7 revolves on its hinge 10, up to approximately 180.

2,730,774 Patented Jan. 17, 1956 The spring or spring extension may be of any type and no claim is made for the spring itself.

Anti-twist bearings being common, no claim is made for this type of bearing broadly; but I claim:

1. A device for closing a door hinged to a jamb, said device comprising, in combination, a door spring having a terminal means of connection to a door, a still? link with which the door spring has a series connection, and a jamb mounting having a pintle portion upon which the link is pivoted, the link having a length materially exceeding the distance from its mounting to the door and having intermediate its ends an abutment extending laterally toward the jamb whereon said mounting is carried forjamb engagement to limit the swinging movement of the link to a range less than that of the door, said link being adapted to project beyond the jamb with which said abutment is engaged and beyond the open door to give said spring moment for door closing and to hold said spring out of door contact.

2. The device of claim 1 in which the link comprises intermediate portions successively offset laterally in opposite directions, one of which constitutes said abutment.

3. In combination, a jarnb, a door having a margin hinged thereto, a mounting connected with the jamb and having an upright pintle in spaced relation to the door, a link pivoted on the pintle for movement between a first position of near parallelism with the closed door and a second position of near parallelism with the jamb, said link having a free end projecting in said second position materially beyond the hinged margin of the door, and resilient closing means connected to the door and to the free end of the link, an abutment in the path of pivotal movement of the link to limit approach of the link to the jamb in its said second position, said abut mcnt comprising means for shifting the point about which the resilient closing means pivots from said mounting to the free end of the link.

4. In combination, a jamb, a door having a margin hinged thereto, a mounting connected with the jamb and having an upright pintle in spaced relation to the door, a link pivoted on the pintle for movement between a first position of near parallelism with the closed door and a second position of near parallelism with the jamb, said link having a free end projecting in said second position materially beyond the hinged margin of the door, and a tension spring connected to the door and to the free end of the link, an intermediate portion of the link comprising an abutment projecting laterally from a direct line from the pintle to the spring and in a position for jamb engagement between the pintle and. the door in the second position of the link, said link having a second intermediate portion offset at the other side of said line from said abutment and between said abutment and said spring to clear the hinged margin of the door in said second link position.

5. An attachment for a door having a spring and a frame to which the door is hinged, said attachment comprising a pivotal mount applicable to the frame, a link pivotally connected to said mount and provided with a connection to which the door spring is attachable and comprising a spring anchorage for limited swinging movement less than that of the door, and an abutment in the path of said link swinging movement to limit the approach of said link toward said frame, said mount, abutment and link comprising means for shifting the point about which the spring pivots from the pivotal mount to the spring connection on the link.

6. The device of claim 5 in which the pivotal mount is spaced materially from the door hinge, said abutment being between the pivotal mount and the door hinge.

7. An attachment for a door swingable through an are greater than and having an elongated resilient closer,

assume I said attachment comprising a pivotal mount,,a link pivotally mounted thereon, and having a free end provided with a coupling, said resilient closer being connected to said coupling, said linkhcomprising an extension of said elongated resilient closer while said door swings throughv a first increment .of its opening movement, van. abutment for arresting pivotal movement'of the link after said'first incrcment'oflmovernent, said abutment and :link'comprising means for shifting the point about which the closer pivots from the :pivotal mount of the link tothe coupling.

at-the free: end of:the link;

8. Anattachment for a-doorhavinga frame, a hinge to which'thedoorvis marginally connected, and. resilient closing means having a partvmounted on the door and bodil'y movably therewith aboutsaid hinge, said attachment comprisingtapivotal mount applicable to the frame I comprising means whereby the resilient closing means pivots about said mount during initial opening movement of the door and about said coupling after the abutment has arrested pivotal movement of the link.

9. The device of claim 8 in which said abutment comprises a part on said link projecting toward said frame for contact with said frame to define said position of said link.

10. The device of claim' 8'in which said resilient closing means comprises a tension springhaving its ends connected respectively to the door and to the link coupling.

References Cited in the'file of this patent UNITED STATES PATENTS 235,315 7 Thomas Dec. 7, 1880 1,276,941 Mansager Aug. 27, 1918 1,716,394 Trammell June 11, 1929 20 2,085,387 Fletcher June 29, 1937 FOREIGN PATENTS 656,242 Germany Feb. 1, 1938 

